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WO2010058474A1 - Attache à expansion - Google Patents

Attache à expansion Download PDF

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Publication number
WO2010058474A1
WO2010058474A1 PCT/JP2008/071141 JP2008071141W WO2010058474A1 WO 2010058474 A1 WO2010058474 A1 WO 2010058474A1 JP 2008071141 W JP2008071141 W JP 2008071141W WO 2010058474 A1 WO2010058474 A1 WO 2010058474A1
Authority
WO
WIPO (PCT)
Prior art keywords
expansion
diameter
bolt
wedge
cylindrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2008/071141
Other languages
English (en)
Japanese (ja)
Inventor
伊藤勝夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koyokizai Co Ltd
Original Assignee
Koyokizai Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koyokizai Co Ltd filed Critical Koyokizai Co Ltd
Priority to PCT/JP2008/071141 priority Critical patent/WO2010058474A1/fr
Publication of WO2010058474A1 publication Critical patent/WO2010058474A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
    • F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
    • F16B13/066—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting a separate expander-part, actuated by the screw, nail or the like

Definitions

  • the present invention relates to an expandable fastener that can be fastened on one side and used to fasten another member to a member that does not reach the inside or the back side, such as the back side of a wall or a pipe.
  • a blind fastener disclosed in Japanese Patent Application Laid-Open No. 2000-220616 has a main body having a plurality of slits from the front end to the rear end of a cylindrical portion and a flange portion protruding from the rear end, and a head portion.
  • a bolt that is inserted into the main body so as to be in contact with the flange portion, a plug that is screwed to the front end of the bolt and has a convex portion for rotation prevention that aligns with the slit on the rear end surface thereof, and a rear end surface of the plug And a guide surface for expanding the cylindrical portion formed on at least one of the front end surface of the main body (Patent Document 1).
  • the plug may be loosened due to vibration or the like even after being fastened and fixed. Once the plug has been loosened, it is gradually separated from the expanded cylindrical portion, and the function of maintaining the expanded state is reduced. For this reason, there exists a problem that the fastening force of a fastening thing and a to-be-fastened thing will fall, and will generate rattling between both.
  • fasteners used in places that are likely to be directly connected to human life accidents such as highways, railway lines, and high-rise buildings are required to have higher quality and safety.
  • the present invention has been made to solve such a problem, and it is possible to easily fasten another member from one side to a member that cannot reach the inside or the back side, and to suppress looseness after fastening. It is an object to provide an expandable fastener that can be made.
  • An expandable fastener includes a cylindrical portion having an insertion hole through which a male screw portion of a bolt can be inserted, and a flange that is provided at the rear end of the cylindrical portion and can be gripped by a predetermined tool.
  • the expanding wedge forms the reduced diameter slit at a position corresponding to each expanded slit of the cylindrical main body, and extends outward from the front end of each reduced diameter slit.
  • the protrusion may be formed and may have a co-rotation preventing protrusion that engages with the expanding slit to prevent co-rotation.
  • the expanding wedge does not have the female screw portion on the inner peripheral surface of the tapered portion, and the inner diameter thereof is formed to be larger than the valley diameter of the female screw portion. May be.
  • FIG. 1 is a front view showing an expandable fastener 1A according to the first embodiment.
  • 2 is (a) a left side view of FIG. 1, and (b) a left side view of the expanding wedge 4A.
  • FIG. 3 is a cross-sectional view taken along line 3A-3A of FIG.
  • the expandable fastener 1 ⁇ / b> A mainly includes a bolt 2, a tubular body 3 that can be inserted through the male screw portion 21 of the bolt 2, and the tubular body 3. It is comprised from the wedge 4A for an expansion provided in the front-end
  • the cylindrical main body 3 has a cylindrical portion 31 formed in a substantially cylindrical shape, and a flange portion 32 provided at the rear end of the cylindrical portion 31. ing.
  • the cylindrical portion 31 is expanded by the expansion wedge 4A and exhibits a fastening function.
  • the cylindrical portion 31 has an insertion hole 33 through which the male screw portion 21 of the bolt 2 can be inserted, as shown in FIG. Further, as shown in FIG. 1, a plurality of expanding slits 34 are formed in the cylindrical portion 31 from the front end to the rear end.
  • This widening slit 34 is for easily expanding the cylindrical portion 31 when tightening the fastening object and firmly tightening it with the widened portion.
  • In the first embodiment in the circumferential direction, etc. Four are formed at angular intervals. If the number of the expansion slits 34 is too small, the expansion resistance is increased, the efficiency of the tightening operation is lowered, and the expansion balance of the cylindrical portion 31 is unbalanced, so that a sufficient fastening force cannot be obtained. Or it becomes easy to loosen. On the other hand, when the number of the expansion slits 34 is too large, the force for holding the fastening is weakened, and the cylindrical portion 31 is easily deformed and may be expanded or closed before performing the tightening operation. .
  • the four expansion slits 34 are arrange
  • the number and arrangement of the widening slits 34 are not limited to this configuration.
  • the use location and the cylindrical portion 31 are used. The diameter is appropriately changed and selected according to the size of the diameter.
  • a tapered wedge guide surface 35 is formed on the inner surface of the distal end portion of the cylindrical portion 31 as shown in FIG.
  • the wedge guide surface 35 plays a role of guiding the expanding wedge 4A, which moves as the bolt 2 is tightened, to be easily press-fitted into the cylindrical main body 3, and is directed toward the inside. It is inclined to.
  • the flange portion 32 is held by a predetermined tool, and plays a role of preventing the cylindrical body 3 from rotating together when the bolt 2 starts to be tightened.
  • the flange portion 32 has three arc-shaped grooves 36 at equal angular intervals in the circumferential direction so that it can be gripped by a special tool. It has become.
  • the shape of the flange portion 32 is not limited to this, and it may be formed in a hexagonal shape so that it can be gripped with a general tool such as a spanner, Also good.
  • the expanding wedge 4 ⁇ / b> A is formed in a cylindrical shape having substantially the same diameter as the outer diameter of the cylindrical portion 31, and is screwed into the male screw portion 21 of the bolt 2. It has a female screw portion 41 and a tapered portion 42 that is tapered toward the rear end.
  • the taper portion 42 makes it easy to press-fit the expanding wedge 4A into the cylindrical portion 31, and reduces the diameter as the tightening progresses, so as to cut into the male screw and exert a function of preventing loosening.
  • the tapered portion 42 is inclined so that the diameter of the pointed portion is substantially equal to the inner diameter of the insertion hole 33.
  • the tapered portion 42 is formed with a plurality of reduced-diameter slits 43 from the rear end to the front end.
  • the diameter-reducing slit 43 is for making it easier to reduce the diameter of the tapered portion 42 with a smaller force.
  • four diameter-reducing slits 43 are formed at equiangular intervals in the circumferential direction. If the number of the diameter-reducing slits 43 is too small, the diameter-reducing resistance is increased, the tightening work efficiency is lowered, and the taper portion 42 may be unbalanced. On the other hand, if the number of the diameter-reducing slits 43 is too large, the strength of each tapered portion 42 is lowered, and there is a possibility that it may be deformed even by a light impact.
  • the present embodiment four reduced diameter slits 43 are arranged at equal angular intervals in accordance with the widening slit 34.
  • the number and arrangement of the reduced-diameter slits 43 are not limited to this configuration, and may be appropriately changed from the viewpoints of ease of reducing the diameter, the degree of biting into the bolt 2, and the like.
  • the expanding wedge 4A is not formed with the female thread portion 41 on the inner peripheral surface of the tapered portion 42 as shown in FIG.
  • the inner diameter of the inner peripheral surface is formed to be larger than the valley diameter of the female screw portion 41.
  • the bolt 2 has a hexagonal hole 22 as shown in FIG. 2A, and is tightened with a hexagon wrench.
  • the shape of the bolt 2 is not limited to this, and may be a general-purpose hexagon bolt, a flat head bolt having a cross hole, or the like.
  • the expandable fastener 1 ⁇ / b> A is inserted into the prepared hole H formed in the fastening object X and the fastened object Y, and the flange portion 32 is placed on the surface of the fastened object Y.
  • the bolt 2 is tightened with a hexagon wrench while fixing the flange portion 32 with a tool.
  • the fixed flange portion 32 prevents the cylindrical body 3 from rotating, the cylindrical body 3 does not rotate together according to the rotation of the bolt 2.
  • the expanding wedge 4A is screwed in the left direction in FIG. At this time, since the taper portion 42 of the expanding wedge 4A slides along the wedge guide surface 35 of the cylindrical main body 3, the expanding wedge 4A is easily pressed into the insertion hole 33 while being guided.
  • the expanding wedge 4A that is screwed presses the inner wall surface of the cylindrical portion 31 outward.
  • the cylindrical part 31 is divided into several sheets along the expansion slit 34, and is expanded radially.
  • the expansion resistance is small and it is easily tightened, and the cylindrical portion 31 is expanded almost uniformly and a balanced fastening state is obtained. can get.
  • the taper portion 42 may be reduced in diameter during the tightening operation.
  • the diameter is reduced at the beginning of deformation. Even so, it contacts the male screw portion 21 only at its end edge.
  • the taper part 42 can suppress contact resistance with the external thread part 21 very small, and prevents it from being disturbed by the biting into the external thread part 21 in the middle of a fastening operation
  • the taper portion 42 of the expanding wedge 4A is further reduced in diameter due to the reaction inward from the inner wall surface of the cylindrical portion 31. .
  • transforms from the substantially circular shape shown to Fig.5 (a) to the pseudo
  • the fastening object X and the fastened object Y are firmly fastened while being sandwiched between the flange part 32 and the expanded cylindrical part 31.
  • the following effects can be obtained. 1. Even if it is a member which cannot reach the inside or the back side, other members can be easily fastened only by work from one side. 2. By entraining the expanding wedge 4A into the male threaded portion 21 of the bolt 2, it becomes difficult to loosen and a stronger fastening state can be maintained. 3. Even if the expanding wedge 4A starts to reduce in diameter, it is adjusted so that it does not bite into the male screw portion 21 immediately but at the time of completion of the fastening operation, and the fastening operation can be completed smoothly.
  • the feature of the expandable fastener 1B of the second embodiment is that, in addition to the configuration of the first embodiment, the expanding wedge 4B prevents co-rotation with the bolt 2 as shown in FIGS. It is in the point which has the protrusion part 44 for co-rotation prevention for doing.
  • the co-rotation preventing protrusion 44 engages with the expansion slit 34 of the cylindrical body 3 and prevents the expansion wedge 4B from co-rotating when the bolt 2 is rotated.
  • the expanding wedge 4B is formed with reduced diameter slits 43 at positions corresponding to the expanding slits 34 formed in the cylindrical main body 3.
  • each co-rotation preventing projection 44 is formed so as to project outward from the tip of each reduced diameter slit 43. That is, the common rotation preventing projection 44 is formed at a position corresponding to the widening slit 34.
  • the four portions separated at equal angular intervals in the circumferential direction in order to form the reduced diameter slit 43 in the tapered portion 42 are subjected to the outer direction by pressing. It is plastically deformed by bending it. As a result, the co-rotation preventing protrusions 44 are formed radially, and at the same time, the diameter-reduced slits 43 corresponding to the shapes of the co-rotation prevention protrusions 44 are formed in the taper portion 42, thereby improving the manufacturing efficiency. To do.
  • the expanding wedge 4B when the expanding wedge 4B is screwed in the left direction in FIG. 9A, the inner wall surface of the cylindrical portion 31 is pressed outward. As a result, as shown in FIG. 9B, the expanding wedge 4B divides the cylindrical portion 31 into a plurality of pieces along the expanding slit 34 and expands radially. Further, since the taper portion 42 does not include the female screw portion 41, even if the diameter is reduced during tightening, the taper portion 42 does not immediately bite into the male screw portion 21, reducing the contact resistance with the bolt 2, and tightening work. Prevent obstruction.
  • the taper portion 42 of the expanding wedge 4B is completely reduced in diameter, and its end edge portion is connected to the male screw portion 21 of the bolt 2. Encroach deeply. As a result, the expanding wedge 4B is less likely to be screwed in any of the forward and backward directions along the male screw portion 21, and a more effective loosening prevention effect can be obtained.
  • the co-rotation preventing protrusion 44 and the reduced diameter slit 43 are provided at a position corresponding to the expansion slit 34. For this reason, each of the tapered portions 42 divided by the reduced diameter slit 43 faces each of the cylindrical portions 31 divided by the expanding slit 34. Thereby, each divided taper portion 42 receives a reaction from the entire inner wall surface of each divided cylindrical portion 31 and is uniformly reduced in diameter, thereby further improving the loosening prevention effect.
  • the fastening object X and the fastened object Y are firmly fastened while being sandwiched between the flange part 32 and the expanded cylindrical part 31.
  • the co-rotation of the expanding wedge 4B can be more reliably prevented, and the efficiency of the tightening operation can be improved. Play.
  • expandable fastener according to the present invention is not limited to the above-described embodiments, and can be appropriately changed.
  • the present invention is not limited to this configuration.
  • the expansion resistance 4A, the expansion resistance of the cylindrical body 3 and the diameter reduction resistance of the expansion wedges 4A, 4B are measured in advance, and the strength is designed so that the taper portion 42 does not reduce the diameter during tightening. If it is 4B, you may form the internal thread part 41 in the whole internal peripheral surface.
  • the expansion slit 34 of the cylindrical main body 3 and the diameter-reduction slit 43 of the expansion wedges 4A and 4B are arranged in the same number, the balance at the time of fastening is improved.
  • the present invention is not limited to this, and a different number may be appropriately formed according to the purpose of adjusting the expansion resistance and the diameter reduction resistance, the place of use, and the like.
  • FIG. 3 is a cross-sectional view taken along line 3A-3A in FIG. It is a figure which shows the usage method of the expansion type fastener of this 1st Embodiment.
  • FIG. 7 is a left side view of FIG. 6. It is a front view which shows the expansion-type fastener of this 2nd Embodiment. It is a figure which shows the usage method of the expansion-type fastener of this 2nd Embodiment.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dowels (AREA)

Abstract

Le problème à résoudre dans le cadre de la présente invention est d’élaborer une attache à expansion qui peut fixer simplement un élément à partir d'un côté de celui-ci à un autre élément, sur le côté intérieur ou arrière de ce dernier, inaccessible par la main, et qui ne peut se desserrer après le serrage. À cet effet, l'attache à expansion possède un corps tubulaire (3), une section de filetage femelle (41) et un coin à expansion (4A). Le corps tubulaire (3) comprend une section tubulaire (31) dotée d’un trou d'insertion (33) dans lequel une section de filetage mâle (21) d'un boulon (2) peut être insérée, une bride (32) disposée à l'extrémité arrière de la section tubulaire (31) et apte à être maintenue par un outil prédéterminé, et des fentes à expansion (34) formées dans la section tubulaire (31) de façon à s'étendre à partir de son extrémité avant jusqu'à son extrémité arrière. La section de filetage femelle (41) est reliée à la section de filetage mâle (21) du boulon (2). Le bord à expansion (41) possède une section conique (42) effilée vers l'extrémité arrière du coin à expansion et possède des fentes de réduction de diamètre (43) s'étendant à partir de l'extrémité arrière vers l'extrémité avant de la section conique (42).
PCT/JP2008/071141 2008-11-20 2008-11-20 Attache à expansion Ceased WO2010058474A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/071141 WO2010058474A1 (fr) 2008-11-20 2008-11-20 Attache à expansion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/071141 WO2010058474A1 (fr) 2008-11-20 2008-11-20 Attache à expansion

Publications (1)

Publication Number Publication Date
WO2010058474A1 true WO2010058474A1 (fr) 2010-05-27

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ID=42197921

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PCT/JP2008/071141 Ceased WO2010058474A1 (fr) 2008-11-20 2008-11-20 Attache à expansion

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WO (1) WO2010058474A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018527532A (ja) * 2015-11-17 2018-09-20 アーコニック インコーポレイテッドＡｒｃｏｎｉｃ Ｉｎｃ． ブラインドファスナー
CN108817796A (zh) * 2018-06-27 2018-11-16 温州盛禾机械科技有限公司 板轴同轴度定位工装夹具及其焊接工艺
CN110421311A (zh) * 2019-08-14 2019-11-08 长沙华恒机器人系统有限公司 一种焊接工装、自动组焊装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52133463A (en) * 1976-04-29 1977-11-08 Itt Bolt anchor
JPS54159553A (en) * 1978-06-05 1979-12-17 Williams Chester Clarke Mine bolt and its fitting method
JP2000220616A (ja) * 1999-01-29 2000-08-08 Japan Drive-It Co Ltd ブラインド型締結具

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52133463A (en) * 1976-04-29 1977-11-08 Itt Bolt anchor
JPS54159553A (en) * 1978-06-05 1979-12-17 Williams Chester Clarke Mine bolt and its fitting method
JP2000220616A (ja) * 1999-01-29 2000-08-08 Japan Drive-It Co Ltd ブラインド型締結具

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018527532A (ja) * 2015-11-17 2018-09-20 アーコニック インコーポレイテッドＡｒｃｏｎｉｃ Ｉｎｃ． ブラインドファスナー
CN108817796A (zh) * 2018-06-27 2018-11-16 温州盛禾机械科技有限公司 板轴同轴度定位工装夹具及其焊接工艺
CN110421311A (zh) * 2019-08-14 2019-11-08 长沙华恒机器人系统有限公司 一种焊接工装、自动组焊装置

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